DAL10(D)E,DAL10(D)E
DAL10(D)G,DAL10(D)G
DAL10(E)F,DAL10(E)F
DAL10(F)G,DAL10(F)G
DAL10(G)H,DAL10(G)H
DAL10(H)I,DAL10(H)I
DAL10(I)J,DAL10(I)J
DAL10(J)K,DAL10(J)K
